Pneumatic tool.



PATENTED OCT. 16, 1906.

N. W. FLETCHER.

PNEUMATIC TOOL.

APPLICATION FILED MAY 20. 1904.

6 SHEETSSHEET 1.

PATENTED OCT. 16, 1906.

N. W. FLETCHER. PNEUMATIC TOOL.

APPLICATION FILED MAY 20. 1904.

6 SHEETS-SHEET 2.

No. 833,710. PATENTED OCT. 16, 1906.

N. W. FLETCHER.

PNEUMATIC TOOL.

APPLICATION FILED MAY 20. 1904.

6 SHEETS-SHEET 3.

fijieoiyea W No. 83;,710. PATENTED OCT. 16, 1906.

N. w. FLETGHER.

PNBUMATIG TOOL.

APPLICATION FILED MAY 20, 1904.

5 SHEETS-SHEET 4.

No. 833,710. PATENTED OCT. 16, 1906. N. W. FLETCHER.

PNEUMATIC TOOL.

APPLIOATION FILED MAY 20. 1904.

' 6 SHEETS-SHEET 6- W 62616866015 Ja e/Mgr;

Mai 5cm .176 56 1 UNITED sTATEs PATENT OFFICE.

TURBINE MOTOR TOOL COMPANY, OF CHICAGO, ILLINOIS, A CORPO- RATION ILLINOIS. Y

PNEUMATIC 'rooL'.

Specification of Letters Patent.

Ifatented Oct. 16, 1906.

Application filed Kay 20. 1904. Serial No. 208,981.

To (all whom it may concern:

Be it known that I, NATHAN W. F E CHER, a citizen of the United States, and a resident of Chicago Heights, in the county of Cook and State'of Illinois, have invented certain new and useful Improvements in Pneumatic Tools, (Case B;) and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accon'qaanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to implements for polishing orgrinding of that class embracing a rotative or turbine motor operated by air or other gaseous fluid and which operates a rotativegrinding or polishing tool.

The implement embodying my invention is more especially ddsigned for use in connection with a planing-machine, lathe, or like machine by which bodily motion may 'be given to the machine, to the work, or to both.

The invention consists in the matters here inafter set forth, and pointed out in the appended claims. A

' As shown in the drawings, Figure 1 is a view in side elevation of an implement embodying my invention. Fi 2 is a plan view of the implement as app ied to the toolsupport of a lathe in osition to operate upon a cylindric blank w ich is actuated by the lathe. Fig. 3 is a sectional view taken upon line 3 3 of Fig. 2. Fig. 4 is a plan section taken on line 4 4 of Fig. 1. section of the parts which support the motor, with the motor omitted, taken upon line 5 5 of Fig. 1. line 6 6 of Fig. 1. Fig. 7'is a perspective view showing the tool embodymg my invention secured to the tool-holder of a lathe and arranged to operate upon the interior of a tube held in a lathe-chuck. Fig. 8 is'a sectional plan view of the base-plate of the implement when arranged for operation as shown in Fig. 7. Fig. 9 is a detail section taken upon line 9 9 of Fig. 8. Fig. 10 is a view in side elevation of the implement shown in the preceding figures as applied to the reciprocating head of a planing-machine or she er.

As i lustrated in said drawings, A indicates the non-rotative member of .a turbine or two alined Fig. 5 is a detail Fig. 6 is a detail section taken onother rotative motor, and A an annular casing or housing which forms part of said non- .rotative member A and incloses the rotative member of the motor, the central part of which is indicated by B.

B indicates a belt-pulley which is attached to the rotative member of the motor and which projects through the central a erture in oneside of the case or inclosure 1E.

0 indicates a shaft on which the rotative part of the motor turns.

D indicates a base-plate having at its 0pposite sides two standardsDD', between which the motor is located and at the u per motor is provided with a tubular handle A, v

to the outer end of which is connected the airsupply pipeA and through which air under pressure is conveyed to the non-rotative member of the motor.

The casing A is provided with an exhaust-outlet A. base-plate D is attached to the top surface of a supporting-plate E, provided at one end with earings e e for a tool-spindle and at its opposite end with like alined bearings e e for another tool-spindle. At

The said its central part said plate E is providedin its top surface with a transverse concave depression e and on its lower surface with a transverse convex projection eflgivingto the central part E of the late theform of acylindric segment. In sai central segmental part E is formed a longitudinal slot E, Fig. 4.

F is a saddle-block having a concave top bearing-surface f, adapted to receive the convex projection e at the center part of the supporting plate. In the concave depression erests a block G, curved at its lower surface to fit said depression. Said blocks F and G are centrally a ertured for the passage of a clamping-bolt Hdiiy' which the device as a whole may be attached to the tool-support of a lathe or other machine. Said clamping-boltv is supporting-plate E will be rigidly clamped to,

shown as havin t its lower end, below the block F, a head and having at its upper end a nut It, provided with radial holes for engagement with. a spanner or like tool. Figs, 1

and 3 illustrate the operation of these parts in the tool-support. The angle of the said plate E with respect to a horizontaP-plane may be changed by shifting or sliding the segmental part E endwise between the blocks F and G before the clamp-bolt is tightened to secure the parts from movement.

As shown in Figs. 1 to 6, inclusive, a toolspindle N is mounted inthe bearings'e e on one end of the su porting-plate E. Said spindle is provided etween said bearings e e with a belt-pulley n, over which and the ulley B of the motor is trained a drivingelt B Said tool-spindle also has attached to its end which projects from one side of the plate E a grindmg-disk N.

As shown in Figs. 2, 3, and 7, I have shown parts of a lathe of ordinary construction wherein the tool-holder I is mounted to slide endwise on a plate I, which is connected by a vertical pivot with a slide J, adapted to slide transversely of the lathe-bed on a toolcarriage J, the tool-support I being thus adapted, to rotate in a horizontal plane, but

means being-used, of familiar construction,

to clamp said tool-holder rigidly in any position in which it may be placed. Said slide J is mounted on transverse guides j 1', attached to the tool-carriage J, whlch latter is mounted on the longitudinal guides j j on the lathe-bed and adapted to be moved endwise thereon by means of a gear-pinion J 'on the carriage, ada ted to engage a rack on the bed. In sai Fi s. 2, 3, and 7 K indicates the head-stock, the tail-stock of the lathe, and L indicates a chuck attached to the livespindle. Said figures illustrate the tool embodyin my invention when applied to ind a cylin' ric blank, (indicated by M,) whlch is held by the chuck L at one end and engaged at its opposite end by the center k on the tail-stock K. When the tool is thus mounted on thetool-carriage J of the lathe, the grinding-wheel N may be adjusted in proper position for action on the blank M. Said carriage may be-moved so as to carry the grinding-wheel endwise of the blank while the latter is being rotated by the lathe and the entire exterior surface of the blank thereby ground to a true cylindric shape. The grinding-disk will be adjusted to make a y through the top surface lighter or heavier cut by moving the tool- .wardly-facing conical bearin recesses, and

the said spindle N at its en to which the tool is attached is provided with a flange or enlargement n, havin a conical bearingface adapted to engaget e'conical bearing-re cess in the adjacent bearin e. At the opposite end of said s indle t e same is screwthreaded and provided with a nut n havin 'its inner face made conical. to fit the conica bearing-recess in the bearing e.

In Fig. 3 I have shown theexhaust-noZzle A on the motor-casing A as provided with a tubular extension A, which is bent ordeflected downwardly, so that its open end is directed toward the blank M at a point where the grindin disk 0 crates upon the ame. By they use 0 such tu ular extension A of the exhaust-nozzle the exhaust-air as it passes from the motor is directed downwardly against the blank and serves to remove or carry away the dust or cuttings-as fast as the same are formed.

Figs. 7, 8, and 9 illlustrate an implement 5 embodying my invention as ap lied to grinding the interior of a sleeve or ot er hollow object. For doing work of this kind I place in the bearings e e of the plate E a tool-spindle 0, provided between said bearings with a belt-pulley 0, adapted to receive motion from the pulley B" on the motor through a driving-belt B. 'Said shaft 0 extends laterally from the side of the plate E'and has on its extremity a grinding-disk O of a size smaller than the internal diameter of the sleeve or other object to be ground. To provide a rigid support for the outer 'end of the shaft 0, or that adjacent to the grindingdisk '0 I provide theplate E with a bearingsleeve P, which. is secured in the bearing a and through which the shaft 0 extends. Said sleeve is provided at its outer end with an annular bearing-surface p for engagement with a corresponding conical bearing-surface 0 on an enlargement o of said shaft 0. Said sleeve is also provided near its inner end with bushings'p p formin bearings for the central part of the shaft In order to rigidly secure the bearing-sleeve P in the bearing e, 12c the latter is 'lon itudinally split or severed and provided wit h lugs 12 e at opposite sides of the slit between its separated parts, through which lugs are inserted clamping screws or bolts e e. The said 'sleeve'P fits 12 5 closely within the cylindric bearing-aperture of the bearing e and is rigidly secured therein by the tightening of the screws 2 e Said sleeve P 1s, moreover, preferably extended inwardly past the inner face of the bearing e 1 a to the adjacent-side face f the ullyo'f lathe, the parts, may be arranged ,The inneriend) of said shaft is shown fittin and turning within'an "aperture formed in t 'e bearing e the shaft having on its end, exterior to thebearing ea collar oand a nut 03. Whenthe tool provided with'the ding-" 'ed to a; as shown disk ()"for'infiernal grinding is, p

n Fi .7, said- .supporting-plate E being reverse orplaced end toend as compared with its osition asshown in-Fi 2 and 3,.

' so as to ring the end ofthe too -s' indle O bearing the grinding-disk toward t e work heldin the chuck L. M in said'F' 7 indicates a tubular blank'heldinthesaid. uck L with its open end presented toward the tool.

In adjusting the grinding-disk O with respect to the work the spindle O may be ica surface to be block the central raised or lowered by sw' in; the saddlecurved art of Y the plate disk toward the surface being ground is efle'cted by shifting the tool-carrier I inwardly or, outwardly in the usual manner. For grmding conical or tapered objects on a lathe or for use as a center grinder for lathesthe implement described will be mounted on the tobl-support I with the late E transverse to the side face of saidtoo -support, or at right angles to its position'in Figs. 2 and 3. When thus mounted, the tool-support is fixed at an angle corresponding to the angle of the conound, while the tool-s in-' dle N will be 1para el with said surface. he sup ortingate E'may then be moved latera y *byt e endwise shifting of the toolsupport, .so as to carry the grinding-disk along the conical surface. p

. In Fig. 10 a tool embodying my invention is shown as applied to' that form of a planingmachine known as a shaper for the purpose, of grinding a flat surface.-

' under the action of the tool when the latter is moved horizontally with the reciprocating head Q. 'Awork-holder R is shown as attached to the upper surface of the-table R, and a blank having the form of a flat late S is shown as secured in'said work-ho der. In the operation of this device the'forward and backward horizontal movement of the head Q moves the tool bodily over or across. the

:sidewise through t usually em loyedin such. machines for this tool-shaft. 'Suc cases where the base-plate D, with the tur- Movement of the said grinding-- plate, and a clamping-bolt inserted thro In this instance Q indicates the horizonta'lly-reci ro- Said tool-ho der is adapted for was lama blank an be shifted sidewiseporlatei'ally *to bring "the 5 different :parts.

of the surface 'successively'under theact on of the grinding-disk' shifting. the table I R "0 use- 0 I the devices purpose. have shown the base-plate D, ,on

"which the motor is directly mounted, ashes ing provided at one end with lugs or stand 'ards'DTD adapIted to form bearings for a bearings will be useful-in bine, is detached froin the supporting-plate E, as ma'fsometime's be done in cases inwhich sai plate E maybe convenientlv attached directly to some part of a mac ine. While the mainframe of the tool illustrated is formed by means bf the supporting-plate E and the separate'plate D, to'which the .motor'is directly secured, yet this particular construction in said frame is not essential, and said frame may be otherwise constructed .in a manner to properly support the motor and to provide for its adjusta le attachment to a lathe'or other machine'in connection with which thema'chine is used.

I claim as my invention- 1. The-combination of a supporting-plate.

provided between its ends with a curved portion ha opposite, parallel, concave and convex s aces, a base-plate attached to the upper surface of said supporting-plate, a

motor mounted on said base-plate, a toolspindle mounted in said supporting-plate, driving means connectingthe rotative vmember of the motor with sai tool-s indle, a saddle-block having a concave s ace adapted to fit the convex surface of said supporting;

the curved portion of the supporting-pla te and through said saddle-block. I

2. The combination of a supporting-plate provided between its ends with a curved portion ha opposite, parallel, concave and convex s aces, a base-plate attached to the upper surface of said supporting-plate, a

motor mounted on said base-plate, a toolspindle mounted in said supporting-plate,

means connecting the rotative member of the motor with said tool-spindle, a saddle-block having an upwardly-facing concave surface fitting the convex surface of said supporting-plate, a block havi a convex lower iurfacfe anid fitting Within t e cionczlwe surace-o sai su porting-p ate an a c amping bolt inserted through said blbck, through the curved portion of the-supporting-plate' and through said saddle-block.

3-. The combination of a supporting-plate having bearings at its opposite ends for toolshafts and provided between its ends with a curved portion having opposite parallel, concave and convex surfaces, a base-plate attached to the upper surface ofsaid supporting pIate, a motor mounted on said asegate, a saddle-block having a concave 8111* ace adapted to fit the convex surface ofsaid supporting-plate, and aclamping-bolt insorted throu h. said. curved: ortion' of the 5 illlpplgrting-p ate and throug x said saddle- 4'. The combination with: a lathe orother ower-driven machine, of an attachment emraeing arotative tool, a motor, a supporting- 10 plate provided with a bearing for said tool and having between, its endis a curved portionprovided with opposite parallel concave andconvex surfaces, a base-plate attached to theupper-surface of said supporting-plate and onwhi'ch the saidmotor is mounted, a saddle- :5 block having a concave surface adapted to fit the convex surface of the said supporti plate, and a clamping-bolt inserted throlflthe said curvedortloli oi the su porting plate and throng saidsaddle-blocl In testitnon that I claimthe foregoing-as mymventlon- 'aflix my signature,inpresence of two witnesses, this I3'th day of May, A. D.

NATHAN W. FLETCHER. Witnesses:

" O. CLARENGE FooLE, GERTRUDE BRYAN. 

